Golf-ball.



intriso horarias Parent* Ormea.

ELEAZER KEMPSI-IALL,

KEMPSHALL MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

GOLF-BALL SPECIFICATION forming part 0E" Letels Fatemi@ No., 696,369,dated March 25, 1902. Application filed February 1, 1902*. Serial No.921225. (No model.)

To all wir/0772, t may concern:

Be it known that I, ELEAZER KEMPSHALL, a citizen of the United States,residing in Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Golf-Balls, ofwhich the following is a specication.

This invention relates to golf-balls coniposed chiefly of gutta-perchaand soft rubber; and its object is to combine the several elements insuoli proportions as to produce an efficient ball having the quality ofbeing dead when given a light blow and exceedingly lively when struck aheavy blow.

In the drawings forming a part of this specification, .Figure l is aview of a ball made according to my improvements, being partly brokenaway so as to exhibit its construction. Fig. 2 illustrates a stage inthe process of completing the ball.

I preferably employ a small core A, made of gutta -percha, which ispreferably introduced while ina fluent condition and then hardenedwithin a rubber envelop B of medium thickness,the gutta-percha beingforced into said envelop to such an extent as to materially expand saidenvelop, as set forth in an application le'd by Francis H. Richards,December 3, 1901, Serial N o. 84,529, whereby the envelop, especiallythe exterior portion thereof, is put into a state of high longitudinaltension, as indicated by the broken curved lines C, the interior portionof the envelop is compressed by the exterior 4portion, as indicated bythe radial lines D, and thecore isI held constantly under compression bysaid envelop. The combination of compressed core and distended envelopenhances the efciency of the ball when struck a heavy blow.

Upon the compound rubber and guttapercha filling I place a very thickshell E, of gutta-percha, preferably in the form of hollow hemispheres,the joint between them being indicated at F. The parts thus assembledIplace between heating and pressing dies G and H. I then heat the diesand bring them together with great force. The heat softens thegutta-percha shell and enables it to weld at the joint F. I thus form ashell E upon the rubber and gutta-perclia filling which possesses greatstrength and durability. The pressure of the dies compacts andsolidiiies the shell, the confined mass of rubber and gutta-percha beingsufficiently resisting to support the comparatively weak material of theshell under any desired degree of pressure of the forming-dies. Thepressure is maintained while the shell cools and hardens, so that thelatter firmly grips the core. It is to be understood that in casecondensation of the bulk of the core A or of the spherical rubberenvelop B takes place it is due to the presence of air-spaces orimpurities in the material. It is not. essential that either said coreor said soft envelop be always condensed in bulk so long as the core,envelop, and shell have the relation and proportions substantially asset forth' herein.

Iuse in the shell a large mass of guttapercha which possesses to asuperlative degree the quality of storing up force from a blow, whichisnecessary in a golf-ball. It will be understood that it is important, inview of the small size of the ball used in this game and the necessityof carrying or flying a great distance, to use in its construction sucha combination of materials as will utilize to advantage every portion ofthe mass of the ball, or, in other words, it is important to eliminateall dead-weight therefrom. Hence it is desirable not only to provide acore or filling having the desired qualities,but also to providetherefor ashell which not only protects said iilling but also itselfcontributes in a large degree to the iiying power or efficiency of theball, while preventing a light blow from af-V fecting the highly-elasticinterior.

By making the hard core A of small diam` eter, the thickness of therubber envelop substantially between ten and fifteen (preferably twelveand one-half) per cent. ofthe diameter of the ball, and the thickness ofthe guttapercha shell between twelve and twenty (preferably sixteen) percent. of the ball-diameter I produce a ball exceedingly efficient andwell adapted to meet the various requirements of the game of golf.

It is not essential in all cases that the core A be gutta-percha northat the rubber` envelop be in a state of distension.

Having described my invention, I claim- 1. A playing-ball comprising ahard core, a spherical soft-rubber envelop thereon whose thickness issubstantially between ten and fifteen per cent. of the diameter of theentire ball, and a gutta-percha shell incasing said envelop, thethickness of said shell being substantially between twelve and twentyper cent. of the diameter of the ball.

2. A playing-ball comprising a hard core, a spherical soft-rubberenvelop thereon whose thickness is substantially twelve and one-half:`per cent. of the diameter of the entire ball, and a gutta-percha shellincasing said. envelop, the thickness of said shell being substantiallysixteen per cent. of the diameterof the ball.

3, Aplaying-ball comprisinga gutta-percha core, a sphericalsoft-rubberenvelop thereon whose thickness is substantially between tenand fifteen per cent. of the diameter of the entire ball, and agutta-percha shellincasing y said envelop, the thickness of said shellbe` ing substantially between twelve and twenty per cent. of thediameter of the ball.

4. A playing-ball comprising a gutta-percha core, a sphericalsoft-rubber envelop disten ded thereon whose thickness is substantiallybetween ten and fifteen per cent. of the diameter of the entire ball,and a gutta-percha shell incasing said envelop, the thickness of saidshell being substantially between twelve and twenty per cent. of thediameter of the ball.

5. A playing-ball comprising ahard core, a spherical soft-rubber envelopdistended thereon whose thickness is substantially between ten andifteen per cent. of the diameter of the entire ball and a gutta-perchashell compressed upon said envelop, the thickness of said shell beingsubstantially between twelve and twenty per cent. of the diameter of theball.

6. A playing-ball comprising a hard core, a spherical soft-rubberenvelop thereon whose thickness is substantially between ten and fifteenper cent. of the diameter of the entire ball, and a gutta-pcrcha shellcompressed and welded upon said envelop, the thickness of said shellbeing substantially between twelve and twenty per cent. ot' the diameterof the ball.

ELEAZER KEMPSHALL.

' Witnesses:

B. C. STICKNEY, JOHN O. SEIFERT.

